pickson



y 1941; c. c. .DICKSON 2,249,750

CHAIR Filed April 20,1938 3 Sheets-Sheet l Inventor Clifford C. Dickson gmdzgw Jlttorneqs y 1941. c. c. DlCKSON 2,249,750

CHAIR Filed April 20, 1938 3 Sheets-Sheet 2 lnventoi Clifford c. Dickson Jlttorneqs y 22, 1941. c. c. DICKSON I 2,249,750

CHAIR Filed April 20, 1938 Sheeqs-Sheet s 179, 111 1-458 140 I ,1}? I 5 5 muuuvl .l 'l{ l ra Fig.5.; (if

1 175 Clifford c. Diekson tending ears I53 formed thereon which overlie the ears I41 of brackets I43 and Island which are attached to the frame M2 by means of the rivets I48, previously referred to.

The vertically extending frame H4 is pivotally mounted on the frame H2 in the following manner. At the joinder of the cross frame member I33 and the longitudinal frame members iii and I32 are formed two loops I54 and I55. These loops are constructed with spaced portions I58 and I59 which provide spaces I56 therebetween. Thevertical frame members I2I and IE2 are arranged within said spaces and are pivoted to the frame IIZ by means of bolts I62 which pass through the portion I58 and IEiii of the loops I5 and I55 and through the said upright frame members. These bolts are so positioned that the lowermost cross frame member I26 is positioned somewhat below the frame I I2, as shown in Fig. i.

The adjusting device of the form of the invention shown in Figs. 4 and 5 utilizes a yoke I53 which is constructed from a bar bent to provide two longitudinally extending legs ltd and IE5 and a cross bar ltd connecting the same. The legs I64 and I85 are twisted, as designated at IB'I, to cause the outer portions I68 of the same to lie in the same plane. The extreme ends of the portions I68 are looped as indicated at I59 to form hinge members which encircle the tubular cross frame member fi l of the frame H6. The looped portions IE9 are constructed at their extreme ends with tongues III which overlie the portions IE8 where the same are confined to the same plane. The tongues III are secured to the portions I88 by means of rivets I12 which prevent hinge members Iiii from opening up.

To maintain the two hinge members I65 in proper spaced relation a link I13 is employed which extends across the portions I 63 of yoke I 63 and which is secured thereto by means of the rivets I12. The yoke IE3 is disposed beneath the brackets I43 and Hid of the frame H2 and straddles the block I39 and standard I58 the same as the device shown in the other form of the invention. The block IE9, as best shown in Fig. 4, is formed at the lowermost and forward portion of the same with an outwardly projecting boss H4. This boss is threaded to receive a screw I15 which projects forwardly from said boss in a substantially horizontal position. This screw is held from rotation with reference to the boss I'M by means of a set screw III) also threaded into saidboss and engaging said screw. Threaded on the screw I75 is a sleeve I13 which has attached to its outer end a handle or knob III by means of which the said sleeve may be rotated. This sleeve 7 I55 and upon rotation is caused to move along the stationary screw H5. As the same moves along the said screw the yoke 53 is moved forwardly or rearwardly depending upon the direction of rotation of the sleeve lid and the frame M4 is tilted forwardly or rearwardly corresponding therewith. As the frame Iii is moved, the hinge members It9 rotate upon the cross frame member I I4 and accommodate relative movement between the yoke I63 and frame II4.

In the construction of the yoke IE3 enough play is allowed in the hole IBI and between the shoulder I78 and collar .I'I9 so that compensation for swinging movement of yoke I63 due to oscillation of the frame H4 about the bolts I62 is had.

The construction shown in Figs. 4 and 5 isused in identically the same manner as that previously described. a

The advantages of my invention are manifest. An extremely simple and practical construction is provided whereby the back rest may be moved in a back and forth direction. The knob for operating themechanism is centrally located and.

'my invention the position of the back rest becomes locked due to the threaded member for adjusting the position of the same.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. In a chair, a supporting standard, a seat frame connected thereto, a pivoted back rest frame extending upwardly therefrom, two rods pivotally connected to the back rest frame and straddling said standard, said rods extending forwardly of said back rest frame, a yoke secured to said rods, a U-shaped bracket having two upstanding legs providing a space therebetween, means for securing said legs to said seat frame, said yoke extending in said space, a threaded spindle passing through said legs and means on said yoke for engagement with said spindle to procure movement ofsaid yoke upon rotation of said spindle.

2. In a chair, a supporting standard, a seat frame connected thereto, a pivoted backrest frame extending upwardly therefrom, two rods pivotally connected to the back rest frame and straddling said standard, said rods extending forwardly of said back rest frame, a yoke secured to said rods, a U-shaped bracket having two upstanding legs providing a space therebetween, means for securing said legs to said seat frame, said yoke extending in said space, a threaded spindle passing through said legs, means on said yoke for engagement with said spindl to procure movement of said yoke upon rotation of said spindle and means at the ends of said spindle for engaging said legs for restraining longitudinal movement of said spindle relative to said seat frame.

3. In a chair, a supporting standard, a seat frame connected thereto, a pivoted back rest frame extending upwardly therefrom, two rods pivotally connected to the back rest frame and straddling said standard, said rods extending for-- circling said rods and restrained from movement by certain of said nuts, said springs urging said yoke into engagement with certain of said nuts and yielding upon excess pressure against the back rest and means for moving said yoke in a back and forth direction.

4. In a chair, a supporting standard, a seat frame connected thereto, a pivoted back rest frame extending upwardly therefrom, two rods pivotally connected to the back rest frame and straddling said standard, said rods extending forwardly of said back rest frame and being threaded throughout the forward portions of the same, a yoke slidable along the ends of said rods, nuts screwed upon said rods, coil springs encircling said rods and restrained from movement by certain of said nuts, said springs urging said yoke into engagement with certain of said nuts and yielding upon excess pressure against the back rest, and a threaded member carried by means on said seat frame and engaging said yoke, said threaded member upon rotation operating to move said yoke in a back and forth direction.

'5. In a chair, a seat frame, a back rest frame including vertically extending frame members, pivot means intermediate the ends of said vertical frame members for pivoting said back rest frame to said seat frame, and providing depending portions on said vertical frame members, a connecting portion connected to said depending portions and disposed below said pivot, two elongated members connected to said connecting portion of the back rest frame and straddling said standard, said elongated members ext/ending forwardly of the standard, a yoke connecting said elongated members together forwardly of the standard, a threaded member, a support for said threaded member issuing from said seat frame, said threaded member engaging said yoke and acting in conjunction with said support to move said yoke to swing said back rest frame forwardly and rearwardly.

CLIFFORD C. DICKSON.

Patented July 22, 1941 Uiii'f E star as m NT 'QFFECE Claims.

My invention relates to chairs and particularly to chairs having a back rest, and has for anobject to provide a construction by means of which the back rest may be easily and quickly adjusted in a back and forth direction.

Another object of the invention resides in providing a chair in which the back rest may be ad-. justed while the operator is seated on the chair. a A still further object of the invention resides in providing a chair in which the back restbecomes automatically locked in adjusted position.

A feature of the invention resides in providing a construction for adjusting the back rest of a fit chair including a threaded member disposed at the forward portion of the chair and immediately below the seat thereof. 1

A still further object of the invention resides in providing a construction in which the back rest is yieldingly held in adjusted position. I

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter i1lustrated and/ or described.

. In the drawings: 7 N

Fig. 1 is a perspective View ofa chair illustrating an embodiment of my invention.

Fig. 2 is a fragmentary sectional view taken on line 2-2 of Fig. l. V

Fig. 3 is an inverted sectional View taken on line 33 of Fig.2. k

Fig. 4 isa longitudinal elevational sectional View similar to Fig; 2 of a modification of the invention. V

Fig. '5 is a plan sectional View taken online 5-5 of Fig. 4.

For the purpose of illustrating the application of my invention, I have shown in the drawings a chair adapted to be used as a stenographers chair and which is indicated in its entirety by the reference numeral I 0; This chair consists of a constitutes the principal. feature of this'invention. The various parts of the chair iii-will now bedescribed-in detail.

- The base I I may be constructed in any desired 7 manner. In the form. of the chair shown. four tubular legs are illustrated which are connected to a socketedhead l1. These legshave attached to them casters [8 which rest upon the forming the subject matter of a co-pending apfloor. The head I! is secured by a construction to be presently described to a frame 12 which carries the seat I3.

The vertical frame M consists of two vertical frame members 2| and 22, a cross frame member 23 at the upper portions of the frame members Hand 22 and cross frame member sections 24 and 25 at the lower portions of the frame members 2| and 22. The frame I4 is constructed from a single length of any suitabble tubular Thepurpose of these off-sets and reverse bends will be presently more fully described.

The frame members 2i and'22 are attached to the frame l2 by a construction to be presently described indetail.

The back rest 15 may be constructed in any suitable manner and has attached to it two brackets 21 which are pivotally connected to suitable supports carried by the vertical frame members 2| and 22 of frame [4. This back rest may be raised and lowered by means of a construction plication for patent.

The frame I2 isbest shown'in Fig. 3., and is constructed from a single bar of metal which is bent to. provide two longitudinally extending frame members iii and 32, a rearwardly extending cross frame member 33. and two forwardly extending cross frame member sections and 36 which are joined together at 31 to form a single front cross frame member 38. At the center'of the framev is-provided a block 39 which is formed with'two grooves il'and 42 on opposite sides thereof. Two brackets E3 and 44 are attached to the block 39 and have parallel portions t5 which are received within the grooves 41 and through. the parallel portions 450i the brackets 43 and '44. These brackets have diagonally extending legs 4fiwhichterniinatein Years 41 attached tothe cross framemembers 3.3 and 38,; by means of rivets 48 The'block' 39 has secured to it a vertically extending standard 49 which is rotatably mounted in the socketed head, II. By

means of this constructioma swivel ,isprovided whereby the seat I6 may rotate with reference to the base II. If desired, an adjustment may be provided whereby the standard 49 may be held in vertically adjusted position with respect to the base II to accommodate the height of the user. The seat I3 has attached to the underside thereof, by means of bolts or screws 5|, two longitudinally extending bars 52. These bars have downturned ears 53 formed thereon which overlie the ears 4'! of brackets 43 and 44 and which are attached to the frame I2 by means of the rivets 48,

previously referred to. By means of this construction the seat I3 is rigidly attached to the frame I2.

The vertically extending frame I4 is pivotally mounted on the frame I2 in the following manner. Extending along the two longitudinally extending frame members 3i and 32 are two plates 54 and 55 which project rearwardly of the cross frame member 33 and are secured to said frame members. Attached to the frame member 33, by means of bolts 57, are two angles 58 and 59 which have legs 6| parallel with and spaced from the plates 54 and 55. The legs 6| are spaced a distance from the plates 54 and 55 equal to the thickness of the tubular frame members 2I and 22 which are spaced apart a distance to'be received between the said plates and angles. Bolts 62 and 63 extend through the frame members 2| and 22 and the corresponding plates and angles and serve to pivotally mount the frame I4 with reference to the frame I2. "It will thus be seen that, upon swinging of the frame I4, the back rest I5 may be moved toward or from the occupant of the chair when seated on the seat I3.

The lowermost portion of the frame I4, as best shown in Figs. 1 and 2, projects below the seat I3. An adjustment of the back and forth screwed upon the other end of the spindle 86 and engages the leg 11. By means of the shoulder 88 and nut 89, the spindle 86 is held from longitudinal movement with respect to the bracket I6. Nut 89 may be secured to the spindle 86 by riveting the end of the said spindle or by means of a set screw or in any other suitable manner.

The yoke II extends through the space between the legs 11 and 18 of bracket I6 and is threaded at 9| to receive the spindle 86. It will thus readily become apparent that, when spindle 86 is rotated While the occupant is seated upon the seat I3,

position of the frame I4 is bad through the same.

For this purpose, the sleeve '26 is provided with two lugs 64 which are welded thereto, and which project upwardly therefrom. Pivotally secured to these lugs are two forwardly extending rods 65 and 66 which are threaded throughout the larger portion of the length thereof, as indicated at 61. Inasmuch as both of these rods are identical in construction, only the rod 65 will be'described in detail. This rod has secrewed upon it a nut 68. Adjacent this nut is a washer 69. Across the two rods 65 and 66, is a yoke 'II which is provided with two openings I2 through which the rods 65 and 66 extend. A washer 73, on'the rod65, is disposed adjacent the yoke II and faces the washer 69. A nut I4 is screwed upon the extremeend of the threaded portion 61 of rod 65 and engages the yoke II. and I3 is disposed a compression coil spring I5 which urges the yoke II toward the nut I4.

The yoke II may be moved forwardly and rearwardly by means of the following construction, which is best shown in Fig. 2. Attached 'to the frame I2, is a bracket or support I6, which is constructed from bar material and which is bent to provide two spaced legs I7 and I8 connected together by means of a connecting portion IS. The leg 11 is secured to the block 39 by means of a screw 8|. The leg I8 is constructed with an off-set 82, which is secured to the frame member 38 bymeans of rivets 83 which also hold the overlapping portions 37 of said frame members together. In the legs 11 and I8 are formed holes 84 and 85 which receive a threaded spindle 86. This spindle is constructed with a knurled knob-81 which provides a shoulder 88 bearing against the outersurface of leg 18. A nut 89 is Between the two washers 69 the knurled head 8'! of spindle 86 may be readily manipulated and the said spindle rotated to move the back rest I5 toward or from the occupant. In this manner the proper adjustment of the back rest is readily procured. Further "adjustment may be had by means of nuts "I4, while adjustment of the spring tension may be had by nuts 68. If the spring action is not desired, the springs I5 may be dispensed with and nuts 68 moved up to the yoke II In Figs. 4 and 5 I have shown a modification of the invention in which certain parts of the frame have been constructed somewhat differently from the frame shown in Figs. 1, 2 and 3. Otherwise, the remainder of the chair, with the exception of the adjusting mechanism, is identical and the description thereof will not be repeated and the same reference numeral preceded by the digit I will be used to describe corresponding parts.

The frame II4 of the chair shown in Figs. 4 and 5 consists of two vertical frame members I2I and I22 and a single cross frame member I24 at the lowermost portion of the same. The tubular material from which this frame is constructed is preferably joined elsewhere than at the cross frame member I24. Such joint may be conveniently placed in the upper frame member of the frame I I4 which is not disclosed in the drawmgs.

The frame II2, which is bestshown in Fig. 5, is similarly constructed from a single bar of metal which is bent to provide two longitudinal extending frame members I3! and I32, a rearwardly extending cross frame member I33 and two forwardly extending cross frame member sections I35 and I36 which are joined togetherat I31 to form a single front cross member I33. At the center of the frame is provided a block I39 which is constructed with grooves MI and I42 on opposite sides thereof. Two brackets I43 and I44 are attached to the block I39 and have parallel portions I45 which are received within the grooves MI and I42. Attachment is accomplished by means of two bolts I49 which extend jointly through the block I39 and through the parallel portions I45 of the brackets I43 and I44. The brackets I43 and I44 have diagonally extending leg I46 'which terminates in ears I41, attached to the cross frame members I 33 and I 38 by means of rivetsl48; The block I39 has secured to He vertically extending standard I49 which is-*rotatably mounted in the socketed head of the base of the chair in identically the same manner as shown in Fig. 1. 'The seat II3, of the chair, has attached to'the underside thereof, by means of bolts or rivets I5I, two longitudinally extending bars I52. These bars have downwardly ex- 

